一种单相三电平SVPWM调制与载波SPWM内在联系

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摘要针对单相三电平二极管钳位(NPC) 电压型整流器, 为了减小其开关切换次数和开关切换损耗, 本文提出了一种单相三电平空间电压矢量调制(SVPWM) 方法和一种基于零序分量注入的单相三电平单极性载波叠层的正弦脉宽调制(TLC-SPWM) 调制方法。分别给出了该SVPWM的详细设计方法和该TLC-SPWM的零序分量设计方法。并通过理论分析和计算, 证明该SVPWM与该零序分量注入的TLC-SPWM本质上为同一类脉宽调制方法, 仅实现方式不同。与传统的单极性TLC-SPWM相比, 这两种调制方法能够有效地减小开关切换次数, 从而减小开关切换损耗。最后, 分别搭建了基于Matlab/Simulink的仿真模型和基于TMS320F2812为控制器的1.3kW实验样机, 仿真和实验结果都验证了该SVPWM算法及其中点电位控制的可行性和有效性。

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关键词 ：三电平, 中点电位控制, SVPWM, 载波SPWM调制, 零序电压分量注入

Abstract：For single phase three-level neutral-point-clamped (NPC)voltage source rectifiers: in order to reduce switching times and losses during communication, A single phase three-level space vector pulse width modulation(SVPWM) technique and a single phase unipolar three-level carrier sinusoidal PWM(TLC-SPWM) technique with zero-sequence voltage injection are proposed in this paper. The design method of SVPWM is shown in detail, and the selection method of zero-sequence voltage in TLC-SPWM is discussed in detail too. Theoretic analysis and calculation results show that the SVPWM method and TLC-SPWM method with zero-sequence voltage injection are the same PWM scheme essentially, and both of the implementing methods are different. The SVPWM and TLC-SPWM methods can effectively reduce switching times and losses during communication compared with traditional TCL-SPWM. Finally, Simulation model in Matlab/Simulink and a 1.3kW experimental prototype with TMS320F2812 controller are designed for the single phase three-level NPC rectifier. The simulation and experimental results verify the feasibility and effectiveness of the proposed SVPWM and neutral point controller.

Key words： Three-level neutral point voltage control SVPWM carrier-SPWM zero-sequence voltage injection

收稿日期: 2010-10-05 出版日期: 2014-03-20

PACS:

TM921.45

基金资助:国家科技支撑计划资助项目(2009BAG12A05)。

作者简介: 宋文胜男, 1985年生, 博士, 主要研究方向为电力牵引交流传动及其控制技术。冯晓云女, 1962年生, 教授, 博士生导师, 国家教学名师, 研究方向为电力牵引交流传动及其控制技术, 列车自动控制(ATC)和列车自动驾驶(ATO)。

引用本文:

宋文胜, 冯晓云. 一种单相三电平SVPWM调制与载波SPWM内在联系[J]. 电工技术学报, 2012, 27(6): 131-138. Song Wensheng, Feng Xiaoyun. Relationship Between Single Phase Three-Level SVPWM and Carrier SPWM. Transactions of China Electrotechnical Society, 2012, 27(6): 131-138.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2012/V27/I6/131

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